Initialize bar with name and give access to it
Update so bar's name cannot be changed
Add empty menu items array to Bar class when initialized
Add method for adding menu items
Add Item class and ability to retrieve menu items
Add default happy hour discount of 0
Add custom setter method
Add test that bar knows when it's happy hour
Add method to determine if it's happy hour
Add test to return false when it's not happy hour
Add test for bar doesn't discount during normal hours
Add method to get drink price during normal hours
Update method for getting price of drink
Add test to check drink discount during happy hour